Pressure-tank cap



Jan, [8, 1929;

H. E. BRANDT PRESSURE TANK CAP Filed March 14, 1927 Patented Jan. 8, 1929.

HENRY E sBRANDTpOF nonrrr s1 PAUL, MINNESOTA.

PRESSURE-TAN K CAP.

Application filed March 14, 1927. Serial No. 175,145. I

This invention relates to pressure tanks having pump'attachments and particularly.

. pump handle.

Other objects will appear and be more fully pointed out in the following specification and claim. y

In the drawings, Figure 1 is a side elevation of my device mounted on a pressure tank of the type commonly used as a sprayer; Fig. 2 is a fragmentary section through the upper portion of the tank with my improved cap thereon; Fig. 3 is a plan view of the cap and fingers attached to the piston rod with said fingers in the free or unlocked position; Fig. 4 is a similar plan View showing the fingers in engagement with the locking lugson the cap and Fig. 5 is a detail section through the cap taken on the line 55 of Fig. 3.

As shown in the drawings, my invention is primarily intended to be applied to a pressure tank 6 of the type adapted for use as a sprayer and having an outlet nipple? for the liquid spraying material. The normally upper end of the tank 6 has a filling neck 8, which projects upward and is threaded externally to receive the capv hereinafter described. A central opening is provided in the neck 8 in which is suspended the cylinder 9 of a pump for establishing pressure wlthin the tank. This cylinder 9 is removable from the tank to permit filling, but may be rigidly secured therein by means of my improved.

cap 10. The cap 10 is threaded internally for engagement with the neck 8 and bears upon an outwardly projecting flange 11 upon the pump cylinder 9. A suitable gasket or washer 12 is placed between the flange 11 and upper end of the neck 8 to prevent leakage.

It will now be understood that the pump cylinder 9 may be secured in proper vertical position within the tank 6 by turning the cap 10 downward upon the threaded neck 8 until the flange 11 upon the pump cylinder is gripped between the cap and washer 12. Closing the upper end of the cylinder 9 1s a portion 13 of the cap 10, which is offset downwardinto the cylinder opening. A cen tral hole in this portion 13 permits the passage of a piston rod 14 therethroughand the upper end of said rod above the cap 10 carries a handle 15 for operating the pump.

Projecting laterally at opposite sides of the 1 rod 14 and rigidly connected thereto is a pair of locking fingers 16 having flat bottom surfaces adapted to bear upon the upper surface of the portion 13. These fingers 16 are arranged to engage a series of lugs 17, formed by offsetting the metal of the cap upward, leaving openings 18 beneath each of the lugs 17. The lugs are preferably arranged in palrs, as shown in Figs. 3 and 4, so that the fingers 16 may be inserted between the lugs 1n the position shown in Figure 3 and then turned toward either side into engagement with a pair of the lugs. The turning movement of the fingers 16 beneath the lugs 17 is limited by end portions 19 of the lugs which extend downward into the path of the fingers. A corner 20 of each lug is also bent-downward, as shown in Fig. 5, so as to retain the fingers beneath the lugs when it is desiredto carry or lift the sprayer tank 6 by means 'of the handle 13. It will be noted that my improved cap closes the upper end of the pump cylinder 9, only the openings 18 beneath the lugs, 17 being left to admit air above the pump piston. As these openings are covered by the lugs 17, there is a minimum of opening for the entry of grit or other foreign matter into the pump cylinder.

In operation, the pump handle 15 is ma- 7 nipulated in the usual manner to establish pressure within the tank 6. When the pump is not in operation, the handle 15 is depressed so as to retract the piston rod 14 within the cylinder, and, if necessary, is turned to carry the fingers 16 between a pair of the lugs 17 as shown in Fig. 3. From this position, the

fingers may be moved horizontally or laterally beneath the lugs 17 as shown in Fig. 4. Now the piston rod 14 and handle 15 are locked in the retracted position and the handle may conveniently be used to carry the pump and tank. By reason of my peculiar form of cap, the cost of the device is reduced to a minimum because the lugs 17 are formed integral with the cap by ofisetting the metal and the straight radial form of fingers 16 simplifies and minimizes the cost of the handle.

Having described my invention what I claim as new and desire to protect by Letters Patent is: i

The combination with a tank havingan upformed with external threads adapted'to re-V ceive a cap, a piston rod having a handle projecting centrally from said neck, a rigid lock- N lng finger projecting laterally from said handie, a threaded thin metal cap adapted to be secured upon said neck, said cap having a central opening for the passage ofsaid rod therethrough, an upwardly and inwardly bent lug on said cap adapted to enclose the outer end of said finger and to extend above the same to retain said piston rod in retracted position within said cylinder, said cap having an opening beneath said lug formed by offsetting the metal constituting said lug and a central portion of said capoffset downward in spaced relation to said lug to limit downward movement of said piston rod said portion constituting a closure only between said opening beneath said'lug and central opening.

signed my name to this specification. HENRY E. BRANDT.-

In testimony whereof, Ihavehereunto 

